Chalk rail for blackboards



Dem 3o, 19:24` 1,521,059

W. H. WEEKS CHALK RAIL FOR BLACKBOARDS Filed March 15. 1923 f ver or.

Wff Weka Patented Der. 3U, 1924.

UNITED stares CHALK FR BLACKEOAEDS.

l. rannte Partnr "fortiles* WILLIAM H. wenns, oroairrann, cfimnonnra; L

Application filed. Er'arch 15,1923. Serial No. 25,337,

means for holding` chalk beneath a 'black-y board, such for instance as is employed in school buildings where the blackboard is formed alongjthe walls of the room. @ne of the important features of the invention residesin providing a screened holder for the chalk so as to do away with the cus-ll tomary chalk dust usually present along the rail of the blackboard. A further object of the vinvention is to provide hinged means 4for securing the screen in such a manner thaty the inner frame holding the screen disappears into a recess in the frame of the blackboard whereby accumulation of dust on the inner frame is prevented. The invention possesses further features which will appear as the description now proceeds with reference to the illustrative embodiment of the invention as shown in the accompanying drawing, in which Figure 1 is a view in plan of the improved chalk rail,

and Figure 2 is a cross section on the line 2 2 of Figure 1.

Referring now to the drawing in detail:

Of the'frame (1) which surrounds the blackv board (2)' only the lower member (3) is shown in the drawing. It is secured in any suitable manner to a suitable support suchy as the wall (4;). Along the lower member of the blackboard frame I use a well (5) projecting outwardly therefrom. The surface of the well is dished out as at (7) to provide a receptacle for collecting the chalk ust. l

Hingedly connected to the lower member (3) of the blackboard frame, preferably by a hinge such as at (8), is a frame (9), the same including along its front rail a downwardly presented flange (10) adapted to overlie the front edge along the well (5) and withthe back rail (11) of the frame received in a recess (12). The under side of the back rail (11) is roundedr off so that when the frame is swung upwardly from the well (5) as shown in dotted linesv in Figure 2, the back rail, (11) may swing clearv of the recess.

A screen (13) is carried within thev area defined by the ,frame and made to directly overlie the well so lthat any chalk dust falling upon thechalk rail will be sifted` through the screen and collected .in the well, where it maybe easily removed byraising the frame, as shown in dotted lines in Figure 2, and brushing or. otherwise cleaning the well. rlhev screeny is" preferably confined within the area of the frame by making a rabbeted edge along they inside of theframe `rails andvusing strips (14) to confinev the screen upon the shelf-likeledge thus provided.

preferably made in certain lengths, as shown in Figure 1, and the respective ends of the 5 lengths are arranged in confronting relation and with the length of the frame correspond ing to the length of thewell. Suitable blocks or the like (15) may be used at the confronting ends of the well and frame sections, and to addv rigidity to the frame it is further suggested to luse transverse `wooden dowels `(16) between the front and back rails ofthe frame beneath the yscreen (13).,y

Various changes in the details may bef resorted to without departing from the spirit claims.` Iclaim:

The well (5) as well as the frame (9) is n vofthe invention as defined by the subjoined 1. A Chalk maar @blackboard haviagf a frame around the samecomprising avwell` disposed longitudinally along the lower member of the blackboard frame and projecting outwardly thereof, a second frame hinged to the front of said blackboard frame having a rear rail disappearing in a recessl in said member adapted to swing to and from a position over said well rand a screen within the area defined by-said frame sub-f' stantially as andforthe purpose described, l

2. A chalk rail, for a blackboard havingl ,a frame around the same comprising a well projecting outwardly along the bottom member of the blackboard frame, a second l frame hingedly connected to the bottom member adapted to swing to and from a position over the well and including a screen within the area defined by said frame, the l back member of the second frame adapted to be received in e recess and Wih the hinge connection made above said recess substantally as and for the purpose descrioee 3. ln combination, e blackboard iriciuding e Well portion and e ioiigitodiriei recessabove and afa onev side o 'he Weii pee tion, and a screen supporting 'e reine hingedly sustained on the rsf frame to occupy spanning or loon-spanning; positioiiwith respeci; to die Weli por'ioi zuid having* s.. portion Working in said recess. d. lil combinscioii, s biaueildsosi iiiciuding e weil poreion and iorigirfdiiizd recess above and er ooe side of *die portion,y e screen siippoi f "L stained on @he first ning or loon-spanning' pos i to the Weil porion and Working iii seid recess,

overhang the oiier edge freine 'to prevent 'escape Weil 1,kooiwbion f 5. n combination., e including @Well foorfion7 meme@ posiioii with respect to the Weil portieri,

arid projecting beyond the seme and s.v de pending derige kori the project-on seaped to overap the outer edge of the Wei poi'- tion for the purpose described.

i( 6. Ir, Combination, e blackboard iframe including e weil portion and longitudinal recess above eind at one side oi the Weii portion? sind e screen, supgeribing iiruie hirigediy srieibsiriee. on the iii-si @crispy spamming; or moe-speri position with respect to he Weil portieri and hevig# c e c'uri'fe yoriffi Working iii recese.

7 "in oori'ibinztioii, s Meeirboai'd ne chidiiig e, weil perdon amd e loig'i'tiidi i recess shove end et one side of he irc-sii poiisioii 

